Doctor for beating engines



1,522,266 E. A. PETERSON DOCTOR FOR BEATING ENGINES Filed 001;. 2, 1922 2 Sheet s-Sheet 1 IN VEN TOR.

BYWJ7M M,

ATTORNEYS,

Jan. 6. 925- 1,522,266

I E. A. PETERSON DOCTOR FOR BEATING ENGINES I Filed Oct. 2, 1922 2 Sheets-Sheet 2 INVENTOR.

' ATTORNEYS.

Patented Jan. 6, 1925.

TATE

EMIL A. PETERSON, 0F APPLETON, WISCONSIN, ASSIGNOB T0 ERNST MAHLER, OF

HCE.

NEENAH, IVISCONSIN.

DOCTOR FOR IBEATING ENGINES.

Application filed October 2, 1922.

To all whom it may concern:

Be it known that I, EMIL A. PETERSON, a citizen of the United States, and resident of Appleton, in the county of Outagamie and State of Wisconsin, have invented new and useful Improvements in Doctors for Beating Engines, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This invention relates to doctors for beating engines, such as are usually employed in making paper pulp and the like and has for one of its objects to provide a device of this character which will be simple in construction, entirely automatic in its action, and more eflicient in operation than those which have been heretofore proposed.

A further object of the invention is to provide a doctor which may be located in an external position in relation to the heating engine roll, to the end that it will be readily accessible and comparatively easy to repair in case of breakage or other damage.

In making paper pulp it is customary to subject the stock, composed of fibers and water, to the action of a beating roll, whereby the said fibers may be fully disintegrated and commingled with the water. Such disintegration is accomplished by various means, one example of which is the well known Niagara beater, in which the circumference of the beater roll is provided with a plurality of transverse blades or knives which rotate in close proximity to the bottom of the beater chamber. The stock is compelled to travel between said blades and said bottom and a grinding, tearing, or cutting action is thus had, which results in a comparatively complete disintegration of the fibers.

When such a beater is operating, it happens in many instances, particularly when the machine is being filled with material.

' that masses of unbeaten stock w ll be forced completely under the roll without being properly disintegrated. This necessarily causes the beater roll to rise somewhat from its normal position and provision is ordinarily made to accommodate such movements to the beater roll. These reciprocating Serial No. 591,879.

movements must, of course, be likewise accommodated by the doctor and it is an important object of the present invention to provide a doctor which will automatically compensate for such rises of the roll.

With the above and other objects in view, which will appear as the description proceeds, the invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the appended claims.

Referring to the accompanying drawings in which like numerals designate like parts in all the views Fig. 1 is a fragmentary side elevational view of a so-called Niagara beater with the present invention applied thereto;

Fig. 2 is a plan view of the parts shown in Fig. 1; and

Fig. 3 is a fragmentary vertical sectional view, taken approximately on the plane indicated by the line 3--3 of Fig. 2, looking in the direction of thearrows.

In the said drawings the numeral 5 designates a portion of the frame of a beating engine of any approved type, here illus trated as a Niagara beater, in which frame is j ournaled the beater roll 6, carried by the shaft 7. The said roll is provided with the usual blades or knives 8, and a housing or cover 9 is placed thereover to prevent the escape of fibers or stock which may adhere to said roll, all as is well known.

The said roll revolves in a counter clockwise direction, as indicated by the arrow in Fig. 3, and it normally discharges the ground paper pulp over the back fall 10, beneath the deflecting arch or cover 11, in the direction of the arrows.

The doctor constituting the present inven tion may be located at any convenient point, such, for example, as the point where the roll cover 9 joins the deflecting arch 11, (see Fig. 3). The said doctor comprises a shaft or rod 12, extending transversely on the roll 6, and suitably journaled in the side walls 5, of the beater. The said shaft 12 is provided with thetangential finger or extension 18, which likewise extends across the beater and in its normal position its lowermost extremity is in close proximity to the outer ends of the beater blades 8, as is clearly illustrated in Fig. 3.

The shaft or rod 12 of the doctor extends somewhat beyond the si le walls at either end, and is provided with pair of depending arms ll, (see Figs. 1 and 2) to which are pivotally connected the push rods 15. These push rods are provided with turnbuckles 16, for changing their lengths to adjust the toe 13 of the doctor to and from the blades 8, whereby the clearance between these parts may be controlled at will. The said push rods 15 are also provided with rollers 17 which engage the surface of the shaft 7 as will be clearly seen from the dra\ ings. The said doctor shaft 12 is also provided with an arm orlever 18 which carries a counter weight 19 so disposed as to normally tend to move the toe of the doctor toward the blades 8 of the beater roll.

The operation of the device will be clear from the foregoing but may be briefly summarized as follows:

here to the blades of the roll and are not. dis

charged over the said back fall, will be carried around until they areengaged by the toe-13oz" the doctor 12, which will dislodge them from the said blades 8 and cause them to be carried forward through the passage above the said back fall 10.

As above stated it sometimes happens that masses of fibers are caught beneath the roll, thus causing the same to rise in its hearings in the beater frame. Provision is usually made to acconnnodate such rises of the roll itself, but if the doctor 12 was rigidly mounted relative to said roll, such a rise of the latter would bring the blades 8 into con-' tact with said doctor, thus causing breakage of either the blades or the doctor, or both. 7 In order to prevent this, the push rods 15 are provided, engaging the shaft 7 of the roll 6 and when the latter rotate in their normal position, the doctor will be main tained in the position illustrated in Fig. 3. However, should the roll 6 rise in its bearings, such motion will be transferred from its shaft 7 to the push rods 15 and. through the arms 14; will cause a partial rotation of the shaft 19 of the doctoig thus causing the latter to move in a counter clockwise direction, to the dotted position shown in Fig. 3. thereby prov ing the blades of the roll in contact therewith. As the to its normal position the i 19 will restore the doctor to the full line position, as will be readily apparent.

lVhile one physical. embodiment of the invention has been described and illustrated, it is obvious that those skilled in the artmay vary the details of construction, as well as the arrangement of parts, without departing from the spirit of the invention and therefore, it is not wished-to be limited to the above disclosure except as may be required by the claims.

What is claimed is 1'. In a beating engine, a beater roll mounted for rotation and for movement transversely of its axis; oscillatable means for removing fibers-from the periphery of said roll; means controlled by, and respou sive to, the transverse movements of said roll, for moving said removing means in one direction when said roll rises; and means comprising a lever arm and a Weight for moving said removing means in the opposite direction when said roll falls.

2. In a beating engine the combination with a heater roll mounted for rotation and for substantially vertical movement relative to its axis; means comprising a transverse member pivotally mounted adjacent the periphery of said roll, adapted to remove fibers therefrom; arms carried by said transverse means; and connections secured to said arms andengaging the shaft of said roll whereby said transverse member may oscillate as said roll rises and falls; to maintain a predetermined distance between 'said transverse member and the periphery of said roll.

'8. In a beating engine the combination of a heater roll provided with aplurality of transverse blades upon its periphery, said roll being mounted for rotation and for substantially vertical movements; a transverse member pivotally mounted adjacent the outer extremities of said blades and adapted to remove fibers therefrom; arms carried by said transverse member; adjustable connections secured to said arms and engaging the shaft of said roll whereby said transverse member may oscillate about its pivots in response to the rise and fall of said roll, to maintain a predetermined distance between said member and the extremities of said blades; and a counter weight secured to said transverse member for moving the latter in one direction.

4. In a beating engine provided with a heater roll mounted for rotation and for substantially vertical movements and with a discharge passage, the combination of a transverse member pivotally ,mounted adjacent the periphery of said roll, adapted to remove fibers therefrom and to discharge the same into said passage; arms carried by said transverse member; push rodspivot ally secured to said arms and engaging the list) shaft of said roll whereby said transverse ing the lengths of said push rods to control member may move in one direction when the predetermined distance between said said roll rises to maintain a predetermined transverse member and the periphery of distance between said member and the pesaid roll.

" riphery of said roll; a counter weight se- In testimony whereof, I affix my signacured to said transverse member adapted to ture. move the latter in the opposite direction when said roll falls, and means for adjust- EMIL A. PETERSON. 

